3com S7906E Guide De Référence

 

1-3 

dba-parameters { discovery-frequency value | discovery-length value | cycle-length value } * 

undo dba-parameters { discovery-frequency | discovery-length | cycle-length } * 

OLT port view 

2: System level 

discovery-frequency value: Specifies the cycle for the OLT to send discovery GATE frames (the cycle 

is known as grant cycle, which is measured in cycle-length). The value argument ranges from 25 to 100, 

and defaults to 50 if you do not use the discovery-frequency keyword (that is, the OLT sends 

discovery GATE frames every 50 cycle-lengths).  

discovery-length  value: Specifies the period in TQs for the OLT to discover ONUs. The value 

argument ranges from 21845 to 87381 and defaults to 41500. 

cycle-length  value: Specifies the cycle-length in TQs (cycle-length is the measurement unit of grant 

cycle). The value argument ranges from 32768 to 131070; it defaults to 65535 if you do not use the 

cycle-length keyword. 

 

1 time quantum (TQ) is equal to 16 ns, which is the time it takes to transmit two bytes of data at 1 Gbps. 

 

Use the dba-parameters command to specify the cycle for the OLT to send discovery frames to ONUs 

and the period in TQs for the OLT to discover ONUs. 

Use the undo dba-parameters command to restore the default DBA parameter values.  

Use the two commands only when necessary. 

# Configure OLT 3/0/1 to periodically send discovery GATE frames at the interval of 30 cycle-lengths. 

<Sysname> system-view 

[Sysname] interface olt 3/0/1 

[Sysname-Olt3/0/1] dba-parameters discovery-frequency 30 

display epon-capability interface interface-type interface-number